Just because I can look at the source of something does not mean it's open source. If it doesn't have an open source license it's just proprietary code that ships in source form.
[1] http://en.wikipedia.org/wiki/Commercial_open-source_applicat...
I didn't say that source code has no value, but providing source is not the same as an open source license, which has significantly more value.
On the other hand, almost all of our licenses include an SLA - which no free open-source license does. In fact, one of the main reasons often cited by people releasing code with FOSS licenses is that they don't have to support it (doesn't mean they won't, they just don't have to). We think the guarantee of support is worth a lot in certain sectors (such as SMBs and enterprise).